/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/HierarchyEditor/NiagaraHierarchyViewModelBase.h
Should return true if properties are supposed to be editable & needs to be true if typical operations should work on it (renaming, dragging, deleting etc.)
virtual [FCanPerformActionResults](API\Plugins\NiagaraEditor\ViewModels\HierarchyEditor\FNiagaraHierarch-_6\FCanPerformActio-) IsEditableByUser()